<?php
/**
 * Smarty plugin
 *
 * @package    Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {counter} function plugin
 *
 * Type:     function<br>
 * Name:     counter<br>
 * Purpose:  print out a counter value
 *
 * @author Monte Ohrt <monte at ohrt dot com>
 * @link   http://www.smarty.net/manual/en/language.function.counter.php {counter}
 *       (Smarty online manual)
 *
 * @param array                    $params   parameters
 * @param Smarty_Internal_Template $template template object
 *
 * @return string|null
 */
function smarty_function_counter($params, $template) {
	static $counters = array();

	$name = (isset($params['name'])) ? $params['name'] : 'default';
	if (!isset($counters[$name]))
	{
		$counters[$name] = array(
				'start' => 1,
				'skip' => 1,
				'direction' => 'up',
				'count' => 1
		);
	}
	$counter =& $counters[$name];

	if (isset($params['start']))
	{
		$counter['start'] = $counter['count'] = (int)$params['start'];
	}

	if (!empty($params['assign']))
	{
		$counter['assign'] = $params['assign'];
	}

	if (isset($counter['assign']))
	{
		$template->assign($counter['assign'], $counter['count']);
	}

	if (isset($params['print']))
	{
		$print = (bool)$params['print'];
	}
	else
	{
		$print = empty($counter['assign']);
	}

	if ($print)
	{
		$retval = $counter['count'];
	}
	else
	{
		$retval = null;
	}

	if (isset($params['skip']))
	{
		$counter['skip'] = $params['skip'];
	}

	if (isset($params['direction']))
	{
		$counter['direction'] = $params['direction'];
	}

	if ($counter['direction'] == "down")
		$counter['count'] -= $counter['skip'];
	else
		$counter['count'] += $counter['skip'];

	return $retval;

}

?>
